At Doelz, Jeff developed software and systems for high availability Local Area Network and Wide Area Network products for large enterprise network infrastructures. After the 1987 stock market crash, Doelz Networks experienced financial difficulties and Jeff was laid off in 1988. Doelz Networks was bought by its management and a group of European investors in 1988.[3]

Jeff co-founded, with Larisa Chistyakov, Trillium Digital Systems in 1988 and served as its President & CEO until its acquisition by Intel Corporation in 2000. Jeff continued at Intel as the Chief Technology Officer for its Communications Group and left Intel in 2002. Trillium Digital Systems developed and licensed communications software to communications equipment manufacturers building the wireless, Internet, broadband and telephone infrastructure. Trillium software has been developed, licensed and used to build telecommunications equipment for over 25 years.

Jeff and his wife, Diane Troth, founded The Lawrence Foundation in 2000 after Trillium's acquisition by Intel. The Lawrence Foundation is a family foundation that makes grants to non-profit environmental, human services, and other causes. The Lawrence Foundation has made over $4 million in grants since its inception.[4]

Jeff co-founded, with Lori Mitchell, the Common Grant Application in 2006 and continues to serve as its President. The Common Grant Application offers a Web-based service that serves as a common application to non-profit grantseekers and a grant management system to non-profit grantmakers.